JPH0696242B2 - Canna - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a canna equipped with a safety cover for covering a cutter.

[Prior Art] In the canna, the cutter is exposed from between the bases, and even though the cutter is exposed, the shadow of the base makes it invisible to the operator, which may be dangerous. .

For this reason, attempts have been made to provide a cutter with a cover for safety, but the cutter exposed from the base is
Since it is exposed only slightly, it was difficult to push the cover by the material to be cut and retract it like a circular saw.

Therefore, it has been attempted to forcefully move the safety cover forward and backward, but in the case of manual operation, the safety cover may be opened carelessly except during cutting, and depending on the method of use, safety can be reliably ensured. I couldn't say that.

[Problems to be Solved by the Invention] However, there is no thing that surely opens the safety cover only when it is used and does not close it securely when it is not used. It was common to force.

As an example of such a structure, there is one in which a handle is provided on the safety cover and the handle is operated to open the safety cover when starting a cutting operation.

According to such a method, the safety cover ensures that the cutter is exposed from the base only during use unless it is used incorrectly.

However, if the handle is operated and any operation other than cutting is performed with the safety cover opened, even a cutter slightly exposed from the base is extremely dangerous if it comes into contact with the cutter.

In particular, if you operate the safety cover incorrectly while treating it as if it is equipped with a safety cover, the danger will increase, and the problem of forcing caution in use is not a substantial solution. There wasn't.

The present invention has been made in view of such circumstances,
It is an object of the present invention to provide a planer which is less dangerous in operation and practically non-existent.

[Means for Solving the Problems] The present invention includes a safety cover that extends from the inside of a base to cover an exposed portion of a cutter, and has a lever having one end connected to the safety cover and the other end pivotally attached. Prepare the inside of the front base so that a part of this lever extends from the front base toward the bottom and pushes this extension part inside the front base so that the safety cover retracts. The problem is solved by configuring.

[Operation] When the base is brought into contact with the material to be cut, the lever is pushed by the material to be cut and retracts, and the safety cover interlocking with this is retracted to expose the cutter.

[Embodiment] The present invention as described above will be explained based on the embodiment shown in the drawings. FIG. 1 is a longitudinal sectional view of an essential part of an embodiment of the plane of the present invention, and FIG. FIG. 3 is a cross-sectional view of the main part thereof.

In FIG. 1, in the planer, a front base 1 and a rear base 2 are formed at slightly different heights in a stepwise manner, and a cutter 3 is slightly formed between the front base 1 and the rear base 2. It is configured to be exposed.

Further, the cutter 3 is provided with a safety cover 5 which is movable back and forth from the frame 4, and the safety cover 5
Is configured to be movable back and forth along the cutter 3 from between the front base 1 and the rear base 2.

Further, the safety cover 5 is formed in an arc shape and is configured to rotate inside the frame 4, and a lever 6 interlocking with the safety cover 5 is provided.

The lever 6 has a fulcrum 7 inside the front base 1, and an action portion 8 extends downward from the front base 1 so that the action portion 8 is inserted into the front base 1. The end portion 9 facing the fulcrum 7 is connected to the safety cover 5 by being pushed in, and the safety cover 5 is retracted.

The safety cover 5 and the lever 6 are
It is constantly biased to one side, and the safety cover 5 covers the cutter 3 by this bias.

In FIG. 2, in the planer, the safety cover 5 and the lever 6 each have a constant width, and the action portion 8 of the lever 6 is formed by projecting two triangular plates from the front base 1. In such a configuration, when the planer is brought into contact with the material to be cut and performs the cutting work, when the front base 1 and the rear base 2 are brought into contact with the material to be pressed and pressed from above, the action portion 8 of the lever 6 is Is pushed by the material to be cut and retracts into the inside of the front base 1, and the safety cover 5 interlocked with this is retracted.

By retracting the safety cover 5, the cutter 3 is exposed and the cutting work can be performed.

When the planer is separated from the material to be cut, the acting portion 8 of the lever 6 projects from the front base 1 by the bias of the spring 10, and the safety cover 5 covers the cutter 3.

Such a safety cover 5 is opened by pressing the planer against the material to be cut, and there is no danger because the safety cover 5 is not opened except when not in use.

The lever 6 is preferably made of a material such as resin and slides well on the material to be cut, and the operating portion 8 is formed in a triangular shape so as to slide on the material to be cut as much as possible. Is preferred.

[Effects of the Invention] According to the present invention, the safety cover is opened by the operation of the cutting work, the safety accompanying the work is surely secured, the risk of contacting the cutter is eliminated, and the safety can be used safely. The effect is extremely large.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part according to an embodiment of the plane of the present invention, and FIG. 2 is a transverse sectional view of the essential part. 1 ... front base, 2 ... rear base, 3 ... cutter, 4 ... frame, 5 ... safety cover, 6 ... lever, 7 ... fulcrum, 8 ... acting part, 10 ... spring.

Claims (1)

[Claims] 1. A planner comprising a cutter which is exposed and rotated between front and rear bases, and a safety cover extending from the inside of the base to cover an exposed portion of the cutter, one end of which is provided with the safety cover. A lever connected to the other end and pivotally attached at the other end is provided inside the front base, and a part of this lever extends from the front base to the lower part, and this extension part is attached to the front base. A planer characterized in that the safety cover is retracted by pushing it inward.